Line planting in interior design refers to the strategic placement of plants in a linear or straight pattern to create a sense of order and structure in a space. This technique can be used to define boundaries, create visual interest, and add a touch of nature to a room. Line planting can be achieved by placing plants in a row along a windowsill, on a shelf, or along a wall to create a cohesive and organized look. It can also be used to divide a room into different zones or to draw the eye towards a focal point. Overall, line planting can help to bring balance and harmony to a space while adding a touch of greenery and life.